Cantor,T. 1842. General features of Chusan, with remarks on the flora and fauna of that island [part 3]. Ann. Mag. Nat. Hist. (1) 9: 481-493 - get paper here

Cope, E.D. 1860. Catalogue of the venomous serpents in the Museum of the Academy of Natural Sciences of Philadelphia, with notes on the families, genera and species. Proc. Acad. Nat. Sci. Philadelphia 1859: 332-347 - get paper here